Để phân biệt chúng từ giật cơ và chuyển động không đều, AASM đã xuất bản hướng dẫn cho PLMS điểm. Những hướng dẫn này nhà nước ít nhất là năm phong trào phải xảy ra trong một loạt trước khi tính có thể bắt đầu. Mỗi phong trào phải kéo dài từ 0,5 và 5,0 giây, và phong trào phải được tách ra từ 5 đến 90 giây. | Polysomnography periods of time. Asynchrony is common. To differentiate them from muscle jerks and irregular movements the AASM has published guidelines for scoring PLMS. These guidelines state that at least five movements must occur in a series before counting can start. Each movement must last between and sec and movements must be separated by 5 to 90 sec. 191 CHAPTER 6 FIGURE . This is a 2-min epoch demonstrating PLMS. Note the periodicity that is evident with each movement separated by 7 to 11 sec arrows . Because of the time separating PLMS and their periodicity they are often best seen with a longer time base . 2-min epoch . The figure above is from the same patient as the previous sample. 192 Polysomnography FIGURE . This is a 2-min epoch demonstrating unilateral PLMS occurring only in the left leg 25 to 30 sec apart arrows . Both legs must be monitored in a PSG with electrodes on the anterior tibialis muscles as discussed previously. This is because occasionally leg movements will be unilateral and may not be detected if only one leg is monitored. .
